Kilbrannan Sound (Scottish Gaelic: An Caolas Branndanach) is a marine water body that separates the Kintyre Peninsula of Scotland from the island of Arran. Kilbrannan Sound is the western arm of the Firth of Clyde.
Coordinates: 55°36′34″N 5°26′00″W / 55.60944°N 5.43333°W